A Goblin at the border
A Goblin at the border
A new dwarf planet for the broad family of the Solar System.
It is officially known as 2015 TG387, since it was that year when the telescope Subaru it was detected for the first time, although several years of work and observation have been necessary to confirm its position and orbit, which is why it has not been until now that it was not officially announced by the International Astronomical Union. A small world, another one, in the confines of our planetary system, once limited by Pluto, and that each discovery shows that until now we hardly knew its innermost parts.
Known informally by its discoverers as "The Goblin", And about 300 kilometers in diameter, is currently about 80 astronomical units (AU) Sun. In context, Pluto It is located at 34 AU. But more important is its extremely long orbit, which leads to "only" 65 AU of our star at the moment of minimum distance, closer than Sedna, for example, but which instead takes it much further away from Sun that his brothers, up to 2,300 AU, a trip so extensive that it takes 40,000 Earth years to complete it. It is one of the few known objects that never gets close enough to the giant planets of the Solar System, like Neptune Y Jupiter, as to have significant gravitational interactions with them.
"These objects of the so-called inner Oort Cloud, such as 2015 TG387, 2012 VP113 and Sedna are isolated from most of the known mass of the Solar System, which makes them immensely interesting"Explained Scott Sheppar, leader of the team responsible for this finding."They can be used as probes to understand what is happening in the limits of our planetary system"
And precisely its orbit is for Sheppard and his colleague Chad Trujillo, who were also responsible for the discovery of 2012 VP113, which opened the "box of thunder" on a hypothetical 9th planet (or Planet X), greater than Earth, hidden in the depths of space, a new indicative that reinforces its existence, since it presents the same similarities in its orbital parameters with other dwarf planets, and that was identified as the work of a concrete influence that would have swept and trapped them in its current trajectories. "These distant objects are like the crumbs of bread that take us to Planet X. The more we can find, the better we can understand the outer Solar System and the possible planet that we believe is configuring its orbits, a discovery that will redefine knowledge about the evolution of our planetary system"Added Sheppard.
The location where Goblin reaches the perihelion is similar to that of 2012 VP113, Sedna and most other extremely distant known objects, which suggests that something is affecting them. It remains an indirect test, and discussed by not a few, but certainly the discovery of a new dwarf planet, a new inhabitant of the depths, which fits with that curious alignment, is still intriguing.
The orbits of 2015 TG387, 2012 VP113 and Sedna, compared to the rest of the Solar System. It was nicknamed "Goblin" by the discoverers, since its provisional designation contains TG and the object was first seen near Halloween.
A comparison of the current position of TG387 2015, to 65 AU, with the known planets of the Solar System. Saturn
you can see 10 AU and the Earth is, of course, 1 AU, since the
measurement is defined as the distance between the Sun and our planet.
The
TG387 discovery images taken at the telescope
Subaru, located on the top of Mauna Kea in Hawaii on 13
October 2015. They were taken approximately 3 hours apart.
New extremely distant Solar System object found during hunt for Planet X
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